Combination tool



Dec. 17, 1940. 3 ALLEN 2,224,892

COMBINATION TOOL I Filed Aug. 5, 1938 e iaaimT-v y INVENTOR. JUHNWALL/EN BY ATTORNEYS Patented Dec. 17, 1940 UNITED STATES COMBINATIONTOOL John W. Allen, Ecorse, Mich., assignor of one-half to Henry E.Rivard, Ecorsc, Mich.

Application August 5, 1938, Serial No. 223,267

3 Claims.

This invention relates to a combination tool and particularly to acombination scriber and center punch. a

An important object of this invention is to provide a handy pocket sizedevice combining in a. highly effective way two tools which areespecially important to machinists, die makers, tool makers, metalpattern makers and others. Another important object is to provide adevice which provides in a compact manner a scriber for ruling lines onmetallic surfaces and a center punch for indenting marks in metallicsurfaces. Another object of this invention is to provide a combinationtool which is economical to make and which comprises few parts easilyassembled together.

The combination tool of the present invention is a self-contained unitof elongated character containing a scriber element projectable for usefrom one end of the tool body but which when released for retractiblemovement into the body is capable of acting as a hammer upon a centerpunching element in the opposite end of the tool body with an impactsuflicientto cause the latter to indent metallic surfaces. A meritoriousfeature of the invention is the provision of surfaces in the tool bodyand on the scriber element which slidingly fit and which at the sametime form a rigid support for the scriber when projected for use.Another important feature of the invention is the novel provision whichpermits slight bodily movement of the center punch element at all timesand which automatically prevents the parts of the tool when assembledto-.

gether from encroaching on the space provided for this bodily movement.Another important feature is the ease and convenience with which the twotool elements may be used and the manner in which the scriber elementmay be shifted to projected position and either self locked in suchposition or released for a hammer-like blow on the center punchingelement.

Various other objects, advantages and meritorious features will becomemore fully apparent from the following specification, appended claimsand accompanying drawing, wherein:

Figure 1 is a longitudinal cross-sectional view through the deviceshowing the position of the scriber element in retracted position,

Figure 2 is an outside view of the device showing the finger control andmanner of moving same to advance the scriber element to projectedposition,

55 Figure 3 is a longitudinal cross-sectional view through the devicebut broken midway to show the position of the parts when the scriberelement is latched in projected position, and

Figure 4 is a detail view of the center punch end of the tool showing amodified form of 5 construction.

Referring to the drawing in detail, the body of the device is of tubularcharacter similar in length and thickness to that of a pencil andcapable like a pencil of being carried in the pocket. 10 The body I!) isinteriorly formed in two sections of different diameters. The largersection l2 extends nearly the full length of the body and opens directlyout through one end thereof as more clearly shown in Figure 3. The otherin- 15 the other end of the body.

slidably mounted in the body is a tool or scriber element having anenlarged heavy end portion 20 I6 and an elongated shank portion l8terminating in a tapered extremity 20. When fully retracted into thebody Hi, the pointed end 20 of the scriber is positioned wholly withinthe body while the other end of the scriber is substantially flush withthe adjacent end of the body. The enlarged portion l6 of the scriberslidably fits the larger interior section H. The shank portion l8slidably fits the smaller interior section ll. When the scriber is movedto projected position, 30 the walls of these two interior sections ofthe body cooperate with the surfaces of the scriber bearing thereagainstto hold the scriber from angular play relative to the body 10 of thedevice. This condition is shown in Figure 3.

A coiled spring 22 in the body Ill encircles the shank of the scriber.One end of this spring seats upon the shoulder 24 formed by the twointerior sections of the body and the other end seats upon the enlargedportion [6 of the scriber.

It is obvious that this spring will be compressed as shown in Figure 3when the scriber is projected from the body of the device. To advancethe scriber against the tension of the spring, the' body of the deviceis provided with a longitudinal slot 26 through which a pin 28 on theenlarged portion of the scriber extends. To facilitate finger control ofthe scriber, a member 30 having a slightly curved serrated surface issecured to the pin. The slot 26 is provided with a bend '32 at itsforward end which extends slightly rearwardly. The scriber may belatched in projected position against the tension of the spring byturning the pin 28 into the bend of the slot.

The end of the device opposite to that through which the scriberprojects is provided with a marking or center punching instrument. Theparts forming this instrument are so arranged that when the scriber isreleased for retractible movement, the spring forces the scriber toreturn at such a speed that it strikes the center punching instrumentwith an impact sufficient to cause the latter to indent metal surfacessuch as steel. Referring to the drawing, the center punching instrumentcomprises a closure member or cap 34 threaded to the exterior body ill.The cap 34 is provided with a hole 36 extending therethrough on the axisof the body In. Projected through this hole is an element 38 having apointed extremity for center punching operations. On the inside of thecap, the element 38 is provided with an enlarged head 40 which is largerthan the diameter of the interior section l2 of the body so that itcannot fit into this portion and become stuck therewithin. The enlargedhead functions as a stop or impact receiving surface against which theenlarged weighted end I6 of the scriber strikes.

It is desirable to allow a slight bodily movement of the enlarged head40 and the pointed element 38 associated therewith. It is found thatsuch bodily movement increases the depths of the indentations made bythe center punch. This slight play of the center punching instrument maybe provided by not tightly threading the cap to the body but it ispreferred to construct the parts in such a way that when the cap isthreaded tightly on the body it automatically provides the desiredclearance in which the enlarged head can move.

This may be accomplished as shown in Figure 4 by shaping the end of thebody upon which the cap is secured so that it has a diameter less thanthe rest of the body and threading this end section for receiving thecap. The shoulder 44 provided by the differences in diameter of thesetwo section is formed on the body NJ in a position'where it brings thecap to a stop before the enlarged head 40 is tightly gripped between thecap and the end of the body [0.

The operation of the device is readily understood from the previousdescription. When it is desired to use the scriber to rule lines onmetallic surf-aces, it is pushed out of the body In and latched in itsprojected position. When it is desired to use the device as a combinedhammer andcenter punch, the pointed punching element 38 is positionedupon a metal surface in the correct position. The body of the device maybe grasped by the fingers of one hand while the thumb of the other handpresses against the serrated secton of the control member and raises itand the scriber therewith against the tension of the spring. When thecontrol member is released by the thumb, the enlarged heavy end of thescriber will strike the enlarged head of the center punch and give it asufficient impact to indent metal surfaces.

What I claim:

1. A combination tool comprising, in combination, a tubular body openedat both ends, a scriber implement lengthwise movable in the tubular bodyhaving an enlarged weighted end portion slidable in the body and atapered narrower portion projectable beyond one end of the body, thelength of said implement bearing such a relation to the length of thetubular body that when the former is fully retracted within the latterthe end of the tapered portion of the implement is protectingly enclosedby the wall of the body, a spring in said tubular body yieldinglyresisting slidable movement of the scriber implement in the direction toproject said tapered end portion. means for manually advancing thescriber implement against the resistance of the spring to project thetapered end portion from said end of the body and for releasably holdingthe implement in this projecting condition, a

closure member on the opposite end of the tubular body provided with ahole therethrough in alignment with the axis of the tubular body, acentering punching element projecting through the hole in the closuremember and having an enlarged head on the inside of the closure memberof a larger diameter than the hole therethrough, said enlarged head ofthe element positioned at substantially the end of the stroke of thescriber implement when the same is impelled by the spring to fullyretracted position in the body whereby when the scriber implement ismoved to projected position and released for return by the force of thespring the enlarged weighted end of the implement delivers a hammer-likeblow to the enlarged head of the centering punching element.

2. A combination tool comprising, in combination, an elongated bodybored out from one end to the other, a scriber tool slidable within thebored section of the body and projectable from one end thereof for use,said scriber tool being of such a length with respect to the body thatit is capable of being retracted wholly therewithin in non-use, springmeans in the body yieldingly tending to retract said scriber tool intothe body, an internally threaded cap threaded to the outside end portionof the body opposite the end from which the scriber tool is projected,said cap having a hole therethrough in axial alignment with but of lessdiameter than the bore opening in the end of the body to which the capis threaded, means limiting the extent the cap can be threaded upon thebody so that a clearance is provided between the end of the body and theinside wall of the cap opposite the bore opening, a punching tool havinga sharpened shank slidable through the hole in the cap and an enlargedhead in said clearance of slightly larger diameter than the bore openingso that it cannot advance thereinto, the thickness of said head in theaxial direction being less than said clearance in the same direction sothat the punching tool is capable of a limited axial movement relativeto the body, said scriber tool adapted when wholly retracted within thebody to abut the enlarged end of the punching tool whereby when thescriber tool is projected and then released under spring pressure itwill strike the enlarged head I of the punching tool with considerableimpact.

3. A combination tool device comprising, in combination, a tubular bodyopened at both ends, a tool lengthwise movable in the tubular bodyhaving an enlarged weighted portion slidable in the body and a narrowerportion having a sharpened extremity projectable beyond one end of theadapted to fully retract the tool within the tubular body, means formanually advancing the tool against the resistance of the spring toproject the sharpened extremity from the body and for releasably holdingthe tool in this projected condition, a punch element, means to retainthe punch element on the end of the tubular body opposite that fromwhich the sharpened extremity of the tool is projectable, said elementpositioned in the device at substantially the end of the stroke of thetool when the same is impelled by the spring to fully retracted positionin the body whereby when the tool is moved to pro jected position andreleased for return by the force of the spring the enlarged weightedportion of the tool delivers a hammerlike blow to the mmch element.

JOHN W. ALLEN.

